xt7m0c4skp6h https://exploreuk.uky.edu/dips/xt7m0c4skp6h/data/mets.xml   Kentucky Agricultural Experiment Station. 1962 journals 121 English Lexington : Agricultural Experiment Station, University of Kentucky Contact the Special Collections Research Center for information regarding rights and use of this collection. Kentucky Agricultural Experiment Station Progress report (Kentucky Agricultural Experiment Station) n.121 text Progress report (Kentucky Agricultural Experiment Station) n.121 1962 2014 true xt7m0c4skp6h section xt7m0c4skp6h x
S
RESULTS OF THE KENTUCKY
- EYBRID POPCORN PERFORMANCE TRIALS
1962
· By Wo K0 Martin, F0 An Loeffel, and Hq R. Richards
Progress Report IRI
{Filing Coie I)
UNIVERSITY OF KENTUCKY
AGRICULTURAL EXPERIMENT STATION
DEPARTMENT OF AGRONOMY
· Lexingtcn

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RESULTS OF THE KENTUCKY HYSRID POPCORN
PERFORMANCE TRIALS - 1962
By W. K. Martin, F. A. Loeffel .
and H. R. Richards
Planted acreage for popcorn in Kentucky was down by 13 percent during 1962. _ _
This year, 22,500 acres was planted as compared with 25,800 in 1961. The average
acreage planted for the period 1951-60 was 21,020 acres. Kentucky ranked fourth
behind Iowa, Indiana, and Illinois in acres planted in 1962 as compared with fifth
in 1961.
This year Kentucky produced an average yield of 1750 pounds per acre as
compared with 2350 pounds per acre in 1961. This reduction in yield can be
attributed mainly to dry weather in August.
Popcorn hybrids developed in the breeding program at the Indiana and Iowa
Agricultural Experimental Stations are included in the evaluation studies in _
Kentucky. Land was made available for these studies by Orrin Hull of Murray _
State College, Murray, Ky., and Graham Duncan, Hopkinsville, Ky. Their _
assistance and interest are acknowledged and appreciated.
Three-, two- and one-year summaries are presented in Tables 1-3. Tables 4
and 5 are the sum aries of the 1962 experiments grown at Hopkinsville and Murray. -
The Murray data for 1961 are not included in Tables 1 and 2.
On the basis of three- and two—year data, Purdue 9318, an experimental white
hybrid, appears to be the best white hybrid tested. P303 has good performance on
the basis of past experiments and is still considered to be the best white hybrid ‘
available for planting in Kentucky. Although Purdue 9318 yielded only slightly
higher than P303, Purdue 9318 was superior in standing ability. The two hybrids
are about the same on the basis of moisture content at harvest.
Iowa 3581, P32, P406A and P4lO appear to be slightly better than the other
yellow hybrids that are available for planting, based on three-year data. Of I
these three, P4l0 was the highest yielding hybrid, but was inferior in standing
ability to Iowa 3581 and P32. Purdue 8367 cms and Purdue 8376 cms, two yellow
experimental hybrids, appear promising based on their yielding and standing
ability records.
On the basis of two-year data, P406A, PQl0 and Purdue 8367 cms were the best
yielding yellow hybrids tested. P632 was low in yield and inferior in standing
ability as compared to the other yellow hybrids. Purdue 8376 cms ranked fourth
in yielding ability, behind P406A, Purdue 8367 cms, and P4lO. There was very
little difference in standing ability among these four hybrids. All other
hybrids appear to be about equal in performance for the two-year test.
EXPERIMENTAL PROCEDURES
Field Design
Each hybrid was planted in four plots at each of the two locations, with
individual plots being two hills wide and five hills long. These plots were

 - located in different parts of the testing field to minimize cultural and soil
differenceso
t Yield
The corn from each plot was harvested and weighed individually. The yield of
the hybrids was determined and is reported on the basis of pounds of ear corn per
acre with a moisture content of 1305 percent, Adjustments were made also for
missing hills but not for other variation in stand. Therefore, the yields at each
· location reported in this report constitute an average yield of the four plots
after all adjustments were made.
· Moisture
The moisture content at harvest is the best measure of relative maturity of
· hybridsq One hybrid may be considered to be earlier than a second hybrid if its
moisture content at harvest is consistently lowera Maturity thus determined is
L not absolute but is relative to the hybrids being comparedo
The moisture content of the grain of individual hybrids was determined at
harvest by removing two rows of kernels from each of eight ears selected at
· random from each of the first three replicationsn The grain from the 24 ears
was thoroughly mixedg and the moisture content of a l50¤gram sample was determined
with a Steinlite moisture meterc
Root Lodging
Plants which lean from the base at an angle of more than 30 degrees from the
_ vertical are considered to be rootelodgedn This character is expressed as a
percentage which is obtained by counting the number of rootelodged plants and
dividing by the number of plants presentc
l Stalk Lodging
· A plant is considered to be stalkelodged when the stalk is broken between the
ear=bearing mode and ground levelo This attribute is computed in a manner similar
to that indicated for root lodgingn
Ear Height
_ Ear height (distance from the base of the plant to the point of attachment of
the upper ear) was measured visually, using a scale with oneefoot intervals, Visual
ratings were made on four plots of each hybrid at each location.
Stand
_ All tests are planted at the rate of 5 kernels per hill and the resulting
plants thinned to 3 per Eilln The stand percentage was computed on the basis of
the total plants present divided by the number of plants which would have been
present if all had survivedo
Diseases
In 1960 disease ratings were taken at Murray for Southern Leaf Blight and are
reported in Table ln Visual ratings were made on a plot basis, using a scale of l-5
with l being resistantu leaf blight was not severe enough in l96l—62 to justify
taking ratingsc
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